Here is the Time Zone info. A careful examination and some deduction should reveal the location of Holmes as well as Watson.
Time Zone Table PST8PDT Pacific Standard Time, Pacific Daylight Time USA (Pacific), Canada (Pacific & Yukon), Mexico (Baja N.) MST7MDT Mountain Standard Time, Mountain Daylight Time USA (Mountain), Canada (Mountain) MST7 Mountain Standard Time USA (Arizona) CST6CDT Central Standard Time, Central Daylight Time U.S.A (Central), Canada (Central) EST5EDT Eastern Standard Time, Eastern Daylight Time USA (Eastern), Canada (Eastern), Bahamas, Haiti, Turks & Caicos AST4ADT Atlantic Standard Time, Atlantic Daylight Time Canada (Atlantic), Bermuda, Greenland (Thule) EST5CDT Eastern Standard Time, Central Daylight Time USA (Indiana) AST10ADT Aleutian Standard Time, Aleutian Daylight Time USA (Aleutian) YST9YDT Yukon Standard Time, Yukon Daylight Time Defunct, previously Canada (Yukon) NST3:30NDT Newfoundland Standard Time, Newfoundland Daylight Time Canada (Newfoundland) NAST3NADT North American (3) Standard Time, North American (3) Daylight Time Saint Pierre & Miquelon NAST9NADT North American (9) Standard Time, North American (9) Daylight Time USA (Alaska) SAT3 South America Standard Time Argentina, French Guiana, Uruguay EBST3EBDT Eastern Brazil Standard Time, Eastern Brazil Daylight Time Brazil (East: Including All Coast and Brasilia) WBST4WBDT Western Brazil Standard Time, Western Brazil Daylight Time Brazil (West) ACRE5 Trinity of Acre Standard Time Brazil (Trinity of Acre) NORO2 Fernando De Noronha Standard Time Brazil (Fernando De Noronha) CST4CDT Chilean Standard Time, Chilean Daylight Time Chile MEZ-1MESZ Mitteleuropaeische Zeit, Mitteleuropaeische Sommerzeit Austria, Germany, Switzerland MET-1METDST Middle European Time, Middle European Time Daylight Savings Time Belgium, Denmark, France, Italy, Netherlands, Norway, Portugal, Spain, Sweden EET-2EETDST East European Standard Time, East European Daylight Time Bulgaria, Finland, Greece, Romania, Russian Fed. (Zone 1), Turkey, Ukraine GMT0BST Greenwich Mean Time, British Summer Time United Kingdom, Ireland WET0WETDST Western European Time, Western European Time Daylight Savings Time Spain (Canary Is.), Faroe Island PWT0PSTPWT Portuguese Winter Time, Portuguese Summer Time Portugal (Madeira) MST-3MDT Moscow Standard Time, Moscow Daylight Time Russian Fed. (Zone 2) EUT1EUTDST European (1) Standard Time, European (1) Daylight Time Greenland (Scoresbysund), Portugal (Azores) EUT-2EUTDST European (-2) Standard Time, European (-2) Daylight Time Lebanon EUT-3EUTDST European (-3) Standard Time, European (-3) Daylight Time Ukraine (Simferopol) EUT-4EUTDST European (-4) Standard Time, European (-4) Daylight Time Georgia EUT-6EUTDST European (-6) Standard Time, European (-6) Daylight Time Kazakhstan EUT-8EUTDST European (-8) Standard Time, European (-8) Daylight Time Mongolia RFT-2RFTDST Russian Fed. Zone 1 Standard Time, Russian Fed. Zone 1 Daylight Time Russian Fed. (Zone 1) RFT-3RFTDST Russian Fed. Zone 2 Standard Time, Russian Fed. Zone 2 Daylight Time Russian Fed. (Zone 2) RFT-4RFTDST Russian Fed. Zone 3 Standard Time, Russian Fed. Zone 3 Daylight Time Russian Fed. (Zone 3) RFT-5RFTDST Russian Fed. Zone 4 Standard Time, Russian Fed. Zone 4 Daylight Time Russian Fed. (Zone 4) RFT-6RFTDST Russian Fed. Zone 5 Standard Time, Russian Fed. Zone 5 Daylight Time Russian Fed. (Zone 5) RFT-7RFTDST Russian Fed. Zone 6 Standard Time, Russian Fed. Zone 6 Daylight Time Russian Fed. (Zone 6) RFT-8RFTDST Russian Fed. Zone 7 Standard Time, Russian Fed. Zone 7 Daylight Time Russian Fed. (Zone 7) RFT-9RFTDST Russian Fed. Zone 8 Standard Time, Russian Fed. Zone 8 Daylight Time Russian Fed. (Zone 8) RFT-10RFTDST Russian Fed. Zone 9 Standard Time, Russian Fed. Zone 9 Daylight Time Russian Fed. (Zone 9) RFT-11RFTDST Russian Fed. Zone 10 Standard Time, Russian Fed. Zone 10 Daylight Time Russian Fed. (Zone 10) RFT-12RFTDST Russian Fed. Zone 11 Standard Time, Russian Fed. Zone 11 Daylight Time Russian Fed. (Zone 11) TTST4 Trinidad and Tobago Standard Time Trinidad and Tobago EIST6EIDT Easter Is. Standard Time, Easter Is. Daylight Time Chile (Easter Is.) MST-8 Malaysia Standard Time Malaysia, Singapore, Indonesia (Central), Philippines CST-8 China Standard Time China, Hong Kong, Taiwan CST-9:30CDT Australian Central Standard Time, Australian Central Daylight Time Australia (South Australia and Broken Hill) EST-10EDT Australian Eastern Standard Time, Australian Eastern Daylight Time Australia (N.S.W & Capitol Territory & Victoria) LHT-10:30LHDT Lord Howe Is. Standard Time, Lord Howe Is. Daylight Time Australia (Lord Howe Is.) TST-10TDT Tasmanian Standard Time, Tasmanian Daylight Time Australia (Tasmania) NZST-12NZDT New Zealand Standard Time, New Zealand Daylight Time New Zealand CIST-12:45CID Chatham Is. Standard Time, Chatham Is. Daylight Time New Zealand (Chatham Is.) SAST-2 South Africa Standard Time South Africa EST-2EDT Egypt Standard Time, Egypt Daylight Time Egypt UAEST-4 United Arab Emirates Standard Time United Arab Emirates IST-3IDT Iraq Standard Time, Iraq Daylight Time Iraq JST-2JDT Jordan Standard Time, Jordan Daylight Time Jordan SST-2SDT Syrian Standard Time, Syrian Daylight Time Syria UCT-9 Universal Coordinated Time -9 Indonesia (East), Korea JST-9 Japan Standard Time Japan UCT Universal Coordinated Time. Iceland, Mali, Ivory Coast, Gambia, Ghana, Guinea, Liberia, Morocco, Senegal UCT1 Universal Coordinated Time 1 Cape Verde Is UCT3 Universal Coordinated Time 3 Argentina, Fr. Guiana, Surinam, Uruguay UCT4 Universal Coordinated Time 4 Barbados, Bolivia, Dominican Republic, Guadeloupe, Guiana, Puerto Rico, Venezuela UCT5 Universal Coordinated Time 5 Cayman Is., Colombia, Ecuador, Jamaica, Panama UCT6 Universal Coordinated Time 6 Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua UCT7 Universal Coordinated Time 7 Mexico (Baja S.) UCT10 Universal Coordinated Time 10 Cook Is., Tahiti, Johnston Is., Hawaii UCT11 Universal Coordinated Time 11, Midway Is. American Samoa, Midway Is., Niue Is., Samoa UCT-1 Universal Coordinated Time -1 Algeria, Angola, Cameroon, Chad, Congo, Gabon, Niger, Nigeria, Tunisia UCT-2 Universal Coordinated Time -2 Botswana, Burundi, Mozambique, Rwanda, Sudan, Swaziland, Zambia, Zimbabwe UCT-3 Universal Coordinated Time -3 Ethiopia, Kenya, Kuwait, Madagascar, Qatar, Saudi Arabia, Somalia, Tanzania UCT-4 Universal Coordinated Time -4 Azerbaijan, Mauritius, Oman, Reunion, Seychelles, United Arab Emirates UCT-5 Universal Coordinated Time -5 Maldives, Pakistan, Tajikistan, Turkmenistan, Uzbekistan UCT-5:30 Universal Coordinated Time -5:30 India, Sri Lanka UCT-5:45 Universal Coordinated Time -5:45 Nepal UCT-6 Universal Coordinated Time -6 Bangladesh, Bhutan UCT-6:30 Universal Coordinated Time -6:30 Myanmar, Cocos (Keeling) Is. UCT-7 Universal Coordinated Time -7 Cambodia, Kampuchea, Indonesia (West), Thailand, Vietnam UCT-8 Universal Coordinated Time -8 Australia (Western), Brunei UCT-9:30 Universal Coordinated Time -9:30 Australia (Northern Territory) UCT-10 Universal Coordinated Time -10 Australia (Queensland), Guam, Papua New Guinea UCT-11 Universal Coordinated Time -11 New Caledonia, Solomon Is., Vanuatu UCT-11:30 Universal Coordinated Time -11:30 Norfolk Is. UCT-12 Universal Coordinated Time -12 Fiji, Kiribati, Nauru, Tuvalu, Wake Is., Wallis & Futana Is. UCT-13 Universal Coordinated Time -13 Tonga
The above is the only factual information needed.
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